Former Parkland school resource officer on trial for inaction during shooting.

The trial of former Broward Sheriff's Office Deputy Scot Peterson, who is accused of failing to confront the Parkland school shooter, has begun. Peterson faces seven counts of child neglect, three counts of culpable negligence, and one count of perjury related to the people who were killed or injured on the third floor of the school building. Prosecutors seek to convince a jury that Peterson failed to follow his active shooter training by remaining outside Marjory Stoneman Douglas High School on Feb. 14, 2018, while a gunman entered the building and killed 17 people. Peterson's defense attorneys claim the school resource officer did not know where the shots were coming from and say more than 20 witnesses will support his recount of the confusion on that day.